"How did you find out what and how much to take, Ginagirl"
-by monitoring my symptoms, body temp etc. Adjusting all the way.
Best indication is when your digestion system work all the way; then the rest work too. Constipation is about the worst symptom I ever had, it affects everything negatively.
Magnesium, boron was the best helpers I had to the iodine, also vit B for digestion issues. I finished it all off with sulfur / msm.